33.1 UVM Runtime Elaboration

By performing the runtime elaboration of a UVM test, you can view testbench structures accurately reflecting the configuration at start of simulation.

Open the Command Palette and invoke the DVT: Select Verification Hierarchy Top command.

Pick a test and check Perform UVM runtime elaboration.

Alternatively, press the button in the Verification Hierarchy view header. Any runtime elaboration of a test is automatically saved and you can later select it as a Verification Top.

The output of the UVM elaboration is printed in the Debug Console.

Click on the left vertical bar to add / remove a breakpoint. If you set any breakpoint in the source code, you are prompted to switch to the Run & Debug View. Elaboration suspends whenever a breakpoint is reached.

The Call Stack View presents all the threads and the current call stack.

The Variables View presents variable values in the current scope.

The Breakpoints View presents all the breakpoints and their enablement state.

You can also add printouts without altering the source code by using logpoints. Right click on the left vertical bar and select Add Logpoint.... You can use only a $display() statement in the editable textbox below the breakpoints list, however its arguments may call other functions.

DPI-C Handling

The UVM runtime elaboration involves DPI-C method calls. DVT has a built-in library of UVM DPI-C implementations. To use it simply check the corresponding box in the verification top selection dialog.

If user-defined DPI-C functions are involved in the elaboration, specify the required shared objects in the Additional arguments textarea using the standard - sv_lib, - sv_liblist and - sv_root flags, for example:

From the Command Palette invoke the DVT: Generate DPI-C Stubs command to generate the DPI-C header stubs command required for the C compilation. Headers, C++ sources and object files are created in the dvt_dpic directory located in the currently opened folder (project root). Particularly if your project uses DPI-C exports you need to specify as additional argument the generated dvt_dpic/dvt_lib_export.so.